Which of the following other pairs of angles are complementary?
select all that apply.
a. ∠a and ∠c
b. ∠b and ∠f
c. ∠c and ∠d
d. ∠f and ∠e

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.

Which of these angles are complementary? a. 45o and 45o b. 63o and 117o c. 45o and 135o d. 90o and 45o

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm2. what is the area of the second triangle?